Drum for cotton cleaners



NW' 3.0 i 1926.

VAN DON HARLAN RUM FOR COTTON CLEANERS Filed Feb. 25, 1926 WlTNEssEs INVENTOR ATTORNEYS Patented Nov. 3Q, lg.

VAN DGN lyttli PATENT FFIQE.

DRUM' FR COTTON CLEANERS.

Application filed February 25, 1925.

This invention relates to in'iprovements in cotton cleaning machinery, and an object of the invention is to provide an improvement in the slats which compose the interior of the drum, the improvement being particularly adapted to a' cotton cleaning machine such as disclosed in my Patent Number 1,533,593 granted April 14, 1925,

Other objects and advantages appear in the following specification, reference being` had to the accompanying drawing, in wliicn Figure l is a longitudinal section of a portion of a cotton cleaning machine illustrating the use of the improved drum.`

Figure 2 is a detail cross section illustrating the alternating arrangement of spiked and unspiked slats.

Figure 3 is a detail perspective vieuT of a portion of the drum again illustrating the arrangement in yFigure 2.

Cotton seed as received at a cotton oil mill usually contains a considerable amount of good cotton which has become mixed with the cotton seeds, hulls and other foreign matters. rlhis good cotton can be successfully reclaimed and the improved drum as herein disclosed is designed for the purpose. Cotton received at the cotton oil mill in the foregoing condition is known as grabot cotton.

The housing l supports a suflicient number of rollers 2 on the interior to provide an adequate mounting upon Which the drum, generally indicated 3, is revoluble by means of a belt'4 and associated driving means fully disclosed in the patent referred to. The belt is applied to the drum casing 5 as shown, the drum casing being used as a1 hase for a noval arrangement of slats on the interior.

Figures 2 and 3 illustrate the alternating arrangement of spiked and unspilred slats 6 and 7. Opposite longitudinal Walls of each of these are tapering as at 8 and 9 thereby making better joints between slats when a'll are fitted in place than if it Were attempted to make the same Walls other Wise. Bolts 10 and 11 are used to secure the respective slats in place, The heads of the bolts are countersunlr in the surfaces of the stats appearing on the interior of the drum 3 so that none of the cotton may catch and collect theireupfm Serial No. SOESS.

Grooves 12 running longitudinally of the slats 6 along one edge marl; the places Where the sharpened ends of spikes 13 protrude. The grooves are of a'n exaggerated V-shape, and the spikes enter the slats at one Wall of the V. The slats 7 do not have spikes, but are provided With perforations lll which register with perforations l5 in the drum casing 5 for the purpose of permitting matter foreign to the salvaged cotton to drop through Where it is disposed of by a suitable conveyor.

In operation the so-called grabot cotton is introduced at one end of the revolving drum 3. The sharp spikes 13 catch and separate the cotton from the seeds, hulls, etc. and carry it up to a point Where it is disposed of by means fully disclosed in the patent mentioned. Matter foreign to the salvaged cotton drops through the registering perforations lll and 15, but it may be stated that in some instances the perforated slats i' can be dispensed iirirh. ln such instances the spiked slats 6 moved close together with no spaces or perforations between them.J ln pr ctice the slats are usually made of Wood, the manufacture thereof beine; both relatively7 simple and comparatively cheap. The fastening of the various slats Within the drum casing 5 is readily acconmlished so that the manufacture of a drum does not remain an elaborate undertal-ring.

While the construction and arrangement of the improved drum is that of a generally preferred form, obviously modifications and changes may be mane Without departing from the spirit of the invention or the scope of the claims.

Having thus described the inventiona I claim is:

1. A drum for the purpose described comprising a drum casing7 a plurality of what spiked slats, a plurality of unspiked slats, and means by which the slats of both lrinds are secured on the interior of the drum casing in alternation.

2. A drum for the purpose described comprising a perforated drum casing, a plurality of slats having perforations matching the perforations in the casing, and a plurality of 'spiked slats arranged in alter-V natioiii with perforated slats;

3. A cotton cleaning machine drum liaving a plurality of slats on the interior, determined ones of the slats being composed of an elongated strip of material having a groove along one surface thereof, and Spikes introduced into said material along Vone Wall of the groove leaving the sharpened ends protruding slightly above said surface of the Slat and extending substantially to l0 one edge of said Slat.

'thereof the opposite and opposing Walls of said Slat being tapering to make an effe:- tive golnt, and a plurality of spikes introduced into said groove, the points of said lspikes being disposed slightly ahove the surface of the respective slats,

VAN DON HABLAN. 

